Serial - 2 x RJ-11 , 1 x DB-25 RS-232C Serial - 56 Kbps

MT5656ZDX

The Multi-Tech MT5656ZDX modems are compatible with the ITU-TV.92 protocol that provide quick connections, downstream transmissions at speeds up to 56K bps, and upstream transmissions at speeds up to 48K bps when connected to V.92-compatible Internet Service Providers.